Post for loose-leaf binders.



H. G. MILLER. POST FOR LOOSE LEAP BINDERS. APPLICATION FILED AUG.26, 1912 Patented Sept. 9, 1913.

awofi'wod v book open and shut.

nun STATES Parana curios.

HENRY C. MILLER, OF MILWAUKEE, WISCONSIN.

POST FOR LOOSE-LEAF -IBINDEIRS.

Post for Loose-Leaf Binders, of which the following is a specification.

This invention relates to bind er-posts for- Ioose-leaf books and in-particular for those books which are intended to hold always a fixed number of leaves and which have a spring-back for assisting inholding the More particularly I aim to provide an improved form bfg-post for the-general type of book illustrated in my co-pending application, Serial Number 659,962, filed November 13, 1911. In that application, I disclosed a book having a novel flexible leaf-post, together with projecting lugs on the covers to which the ends of the posts where, attached by pintles for causing the posts to bend inwardly when the book is shut and outwardly when it is opened.

The form of post herein disclosed is jointed as distinguished from the continuously flexible form shown in my aforesaid application. It will 'be' found that the v jointed form, while it does not supersede the continuous flexible form, has certain advantages in certain situations both in the matter of service and economy; and while I have illustrated it in conjunction with the aforesaid spring-back book or binder, it can also be used wherever a flexible post is desired and independently of my aforesaid invention.

For the better understanding of my invention, I have illustrated in the accompanying drawings several forms in which it may be embodied.

In these drawings Figure 1 is a front view of a three-link post extended; Fig. 2 shows the post in side elevation in'situ within a book of the kind previously referred to, the book being shown in section and only the back part thereof illustrated, this showing the closed position of the book; Fig. 3 is a similar view showing theopen position of the-book; Fig. 4 is a side view of a two-link post, the same being shown in full lines in the position which itwould occupy in the closed position of the book and in dotted- Specification of Letters Patent.

Application filed August 26, 1912.

V Patented Sept. 9, 1913.

Serial No. 717,214.

shown in Figs. 4 and 5 respectively; and Fig. 8 is a perspective view of a post with open links.

In these drawings each reference letter or character refers to the same part wherever used.

My improved jointed post is made up of a series of links a, b, and '0, the middle link Z) being jointed to the end-links a and 0 by means of pintles d and e which pass through lugs f-formed on both ends of the member I) andone end of the members a and c, the adoining lugs overlapping so as to make the post eflectively continuous. The free ends vided to press upon the covers tohold them open or shut. As in my aforesaid patent application, lugs n and care shown on the opposite sides of the hinge-plates 11, the function of these lugs being to press against the sides of the end-links a and (1 and push them into the concave or convex position .when' the book is shutor opened. As indicated in Figs. 2 and 3, the links are preferably made with a curvature such that in the closed position of the book they form a continuous circular arc. This however is merely in order to give the book the correctappearance when closed and is not essential, as the links may be made straight as illustrated in Fig. 5. In Figs. 4 and 6 the post is constructed of two links-only, a, and b, which are of the same form as the links a and c in Fig. 1, being united directly by a pintle d. In Figs. 5 and 7 the post is provided with four links a" b b and c, of the same form, except as to curvature, as the links a, b, and 0, and united by pintles d". The links are here shown as straight. Although any number of links may be used, a greater number than four will, it is believed, not be found necessary or desirable, and forbooks of ordinary size I prefer to use three links, inasmuch as with the aid of the guiding lugs 92 and 0, the position of each of the three links is more or less definitely determined. For small books the two-link form will be found desirable and has the advantage that books can be made to open flat er in the mid le In Fig. 8 I have shown a chain form of post which is made up of two three-sided end-links p, each provided with apintlehole g through the middle bar 7 thereof; and any number of pairs of intermediate links 3, so made that their exterior surfaces are continuous with the exterior surfaces of the end-links and of each other, and having on their ends lugs t through which pass the joint-pins u. The links .9 are held in position on the pins .24 by means of spacing sleeves 'v. This figure illustratesbut one possible form of many of the open-chain pattern that might be devised consistently wit-h my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

'l. A binder-post comprising a series ofbeing each in the form of a. central bar perforated to receive a. pint-le-rcd and twosideportions at right-angles thereto and perforated at their ends: and an intermediate link being also perforated at its ends and united by joint-pins to the end-links.

3. In combination with a binder, a binderpost comprising a series of links pivoted together, the ends of the series being connected to the binder-back; each of the abutting ends of each two of the links being provided with a lug and each pair of abutting lugs interlocking and being connected by a transverse pintle passing through them, whereby the lllll(S have a pivotal movement on each other in a plane perpendicular to the binderback and the leaves are excluded from getting between said abutting ends.

In witness whereof, I have hereunto set my hand in the presence of two witnesses,

' HENRY C. MILLER.

Witnesses:

J USTUS CAHN, EDWARD C. STADLER. 

